Hypertrophic heart muscle cells contain increased amounts of

A.Messenger RNA.
B. smooth endoplasmic reticulum.
C. peroxisomes.
D. phagosomes.

The answer is A.
Hypertrophic cardiac myocytes, which are larger than normal, have more cytoplasm and larger nuclei than normal cells. The enlarged nuclei contain more DNA and RNA than their normal counterparts and generate more messenger RNA. The cytoplasm of hypertrophic myocytes contains more myofilaments and mitochondria, but the number of other cytoplasmic organelles is not increased. Water influx, which is typical of hydropic swelling, is not found in hypertrophy